Global Patent Index - EP 2803948 A3

EP 2803948 A3 20141203 - Reference signal generation apparatus and reference signal generation system

Title (en)

Reference signal generation apparatus and reference signal generation system

Title (de)

Referenzsignalerzeugungsvorrichtung und Referenzsignalerzeugungssystem

Title (fr)

Appareil et système de génération de signal de référence

Publication

EP 2803948 A3 20141203 (EN)

Application

EP 14001665 A 20140512

Priority

JP 2013103902 A 20130516

Abstract (en)

[origin: EP2803948A2] A reference point detection light-receiving unit receives light from a reference point detection pattern by first to fifth light-receiving elements. The first to fifth light-receiving elements are arranged in a first direction and outputs first to fifth signals, respectively. A reference signal generation circuit outputs a reference signal that starts at a period where a level of a signal, which is obtained by adding first and second signals, and a level of a signal, which is obtained by adding third and fourth signals, will become equal, and ends at a period where a level of a signal, which is obtained by adding the second and third signals, and a level of a signal, which is obtained by adding fourth and fifth signals, become equal.

IPC 8 full level

G01D 5/347 (2006.01); G01D 5/244 (2006.01); G01D 5/36 (2006.01); G01D 5/38 (2006.01)

CPC (source: EP US)

G01D 5/24438 (2013.01 - EP US); G01D 5/347 (2013.01 - US); G01D 5/366 (2013.01 - EP US); G01D 5/38 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2803948 A2 20141119; EP 2803948 A3 20141203; EP 2803948 B1 20161116; CN 104236606 A 20141224; CN 104236606 B 20180525; JP 2014224746 A 20141204; JP 6087722 B2 20170301; US 2014339404 A1 20141120; US 9157769 B2 20151013

DOCDB simple family (application)

EP 14001665 A 20140512; CN 201410360863 A 20140516; JP 2013103902 A 20130516; US 201414270721 A 20140506